航空搭载对薰衣草种子萌发的影响

摘要

[目的]研究经太空诱变后薰衣草种子发芽及出苗的变异程度.[方法]以经太空诱变的薰衣草种子为试材,与未经太空诱变的种子进行发芽及出苗比较试验;同时研究了不同赤霉素浓度及不同浸种时间对太空搭载的薰衣草种子和陆地薰衣草种子发芽和出苗的影响.[结果]太空搭载的薰衣草种子较陆地薰衣草种子的发芽势、发芽率、发芽指数和出苗率均明显下降.在清水浸泡处理下,太空种子的发芽率为25.00%,发芽势为21.50%,发芽指数为1.904,分别比陆地种子降低了70.59%、74.71%和93.58%.赤霉素处理在一定程度上提高了太空种子的发芽指标,但与陆地种子相比,发芽率、发芽势和发芽指数仍较低,差异显著.不同浓度赤霉素浸泡时间对薰衣草种子发芽影响差异不显著.当赤霉素浓度为300 mg/L时,最有利于太空种子成苗.[结论]该研究为太空薰衣草育种奠定基础.%[Objective] To study variation degree of germination and seedling of Lavandula angustifolia seeds after space flight.[ Method] La-vandula angustifolia seeds treated by space flight were used as material, non-space induced seeds were used as control, and the seeds germina-tion ratio, germination energy, germination index were studied.At the same time, the effects of different GA3 concentrations and different soa-king times on two kinds of Lavandula angustifolia seeds germination and seedling ratio were studied.[ Result] The results showed that germina-tion rate, germination index and seedling ratio of Lavandula angustifolia seeds treated by space flight were significantly lower than normal La-vandula angustifolia seeds.When both kinds of seeds were soaked by water, the germination rate, germination energy and germination index was 25.00%, 21.50% and 1.904, respectively, which was 70.59%, 74.71% and 93.58% lower than normal seeds.Gibberellin treatment increased seed germination indexes of space seed, but germination rate, germination energy and germination index were still lower of normal seeds.The differences between space seed and normal seed were significant.There was no significant difference between space seeds and mor-nal seed in germination indexes when treated by gibberellin with different times.The space seedling ratio was highest when the concentration of gibberellin was 300 mg/L.[ Conlusion] The study lay a foundation for Lavandula angustifolia space breeding.